| South Callaghan Ranch G-4-131672 | Calpine Natural Gas L.P. only | Big Cowboy (Lobo) | Webb | 1 | 0 | 306K | by Jan 1993 – May 1994 |
| South Callaghan Ranch G-4-132251 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 389K | by Jan 1993 – Oct 1997 |
| Callaghan Ranch G-4-133163 | Hilcorp Energy Company only | Finley-Webb (Upper Cons) | Webb | 1 | 0 | 396K | by Jan 1993 – Mar 2007 |
| Callaghan Ranch G-4-134208 | Mobil Producing TX. & N.M. Inc. only | Finley-Webb (Wilcox 5600) | Webb | 1 | 0 | 51K | by Jan 1993 – Mar 1994 |
| South Callaghan Ranch G-4-136952 | Mobil Producing TX. & N.M. Inc. only | Brettchance, West (Lobo 6) | Webb | 1 | 0 | 2.54K | by Jan 1993 – Oct 1993 |
| South Callaghan Ranch G-4-137225 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 196K | by Jan 1993 – Oct 2002 |
| South Callaghan Ranch G-4-137330 | Rosetta Resources Operating LP only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 0 | 144K | by Jan 1993 – Mar 2003 |
| South Callaghan Ranch G-4-137476 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Wilcox, Lo.) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-138971 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 609K | by Jan 1993 – Mar 1999 |
| South Callaghan Ranch G-4-138989 | Rosetta Resources Operating LP only | Dix Ranch(lobo 1) | Webb | 1 | 0 | 222K | by Jan 1993 – Jul 2006 |
| Callaghan Ranch G-4-139349 | Mobil Producing TX. & N.M. Inc. only | Wildcat | Webb | 1 | 0 | 0 | — |
| Callaghan Ranch G-4-139467 | Mobil Producing TX. & N.M. Inc. only | Wildcat | Webb | 1 | 0 | 0 | — |
| Callaghan Ranch G-4-139545 | Chesapeake Operating, Inc. only | Finley-Webb (Upper Cons) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-139681 | Mobil Producing TX. & N.M. Inc. only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 0 | 9.98K | by Jan 1993 – Nov 1993 |
| Callaghan Ranch G-4-139837 | Mobil Producing TX. & N.M. Inc. only | Finley-Webb (Wilcox 5600) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-140153 | Rosetta Resources Operating LP only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 0 | 733K | by Jan 1993 – Sep 2006 |
| South Callaghan Ranch G-4-140161 | Rosetta Resources Operating LP only | Brettchance, West (Lobo 6) | Webb | 1 | 0 | 271K | by Jan 1993 – Apr 1999 |
| Call G-4-140285 | Shoreline Production Serv., Inc. only | White Point, East (Het) | Nueces | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-140486 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Lobo 6) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-140858 | Rosetta Resources Operating LP only | Small Cowboy (Lobo 6) | Webb | 1 | 0 | 4.31M | by Jan 1993 – Aug 1998 |
| South Callaghan Ranch G-4-141434 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 1.24M | by Jan 1993 – Aug 2007 |
| South Callaghan Ranch G-4-141435 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Lobo 2) | Webb | 1 | 0 | 123K | by Jan 1993 – Nov 1993 |
| South Callaghan Ranch G-4-141439 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek(lobo 1) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-141490 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-141890 | Rosetta Resources Operating LP only | Brettchance, W. (Lobo 2) | Webb | 1 | 0 | 1.06M | by Jan 1993 – Aug 2006 |
| South Callaghan Ranch G-4-141891 | Rosetta Resources Operating LP only | Brettchance (Lobo 2-A) | Webb | 1 | 0 | 561K | by Jan 1993 – Jun 1995 |
| South Callaghan Ranch G-4-141895 | Rosetta Resources Operating LP only | Beccero Creek (Wilcox, Lo.) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-141897 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Lobo 2) | Webb | 1 | 0 | 15.4K | by Jan 1993 – Jan 1993 |
| South Callaghan Ranch G-4-141898 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Lobo 6) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-142532 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek(lobo 1) | Webb | 1 | 0 | 46.6K | by Jan 1993 – Apr 1994 |
| South Callaghan Ranch G-4-142544 | Rosetta Resources Operating LP only | Callaghan (Wilcox) | Webb | 1 | 0 | 86.5K | by Jan 1993 – Apr 1996 |
| South Callaghan Ranch G-4-142873 | Rosetta Resources Operating LP only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 0 | 553K | by Jan 1993 – Oct 2004 |
| South Callaghan Ranch G-4-142877 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 715K | by Jan 1993 – Dec 2004 |
| South Callaghan Ranch G-4-142878 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 568K | by Jan 1993 – May 2007 |
| South Callaghan Ranch G-4-143033 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 1.02M | by Jan 1993 – Sep 2006 |
| South Callaghan Ranch G-4-143121 | Rosetta Resources Operating LP only | Brettchance (Lobo 6) | Webb | 1 | 0 | 535K | by Jan 1993 – Apr 2004 |
| South Callaghan Ranch G-4-143129 | Rosetta Resources Operating LP only | Beccero Creek (Lobo 2) | Webb | 1 | 0 | 484K | by Jan 1993 – Sep 2006 |
| South Callaghan Ranch G-4-143208 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-143215 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Lobo 2) | Webb | 1 | 0 | 147K | by Jan 1993 – Jun 1994 |
| South Callaghan Ranch G-4-143441 | Mobil Producing TX. & N.M. Inc. only | Big Cowboy (Lobo 1) | Webb | 1 | 0 | 97.2K | by Jan 1993 – Jun 1994 |
| South Callaghan Ranch G-4-143536 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 420K | by Jan 1993 – Oct 2001 |
| South Callaghan Ranch G-4-143678 | Rosetta Resources Operating LP only | Small Cowboy (Lobo 6) | Webb | 1 | 0 | 606K | by Jan 1993 – Nov 1994 |
| South Callaghan Ranch G-4-143689 | Rosetta Resources Operating LP only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 0 | 399K | by Jan 1993 – May 2003 |
| South Callaghan Ranch G-4-143895 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 760K | by Jan 1993 – Nov 2006 |
| South Callaghan Ranch G-4-143954 | Rosetta Resources Operating LP only | Wildcat | Webb | 1 | 0 | 0 | — |
| South Callaghan Ranch G-4-143969 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 1.16M | by Jan 1993 – Dec 2005 |
| South Callaghan Ranch G-4-143972 | Mobil Producing TX. & N.M. Inc. only | Beccero Creek (Lobo 2) | Webb | 1 | 0 | 110K | by Jan 1993 – Apr 1995 |
| South Callaghan Ranch G-4-144028 | Rosetta Resources Operating LP only | Beccero Creek (Lobo Cons.) | Webb | 1 | 0 | 1.03M | by Jan 1993 – May 1997 |
| South Callaghan Ranch G-4-144338 | Rosetta Resources Operating LP only | Beccero Creek (Wilcox, Lo.) | Webb | 1 | 0 | 214K | by Jan 1993 – May 1997 |
| South Callagahan Ranch G-4-144452 | Rosetta Resources Operating LP only | Callaghan, N. (Wilcox, Lo.) | Webb | 1 | 0 | 627K | Feb 1993 – Sep 1999 |